The thing about IP and therefore with IPv6 is it's not just an address format - it's a set of protocols and practices so a lot of it changes.

Address asignment in an IPv6 world is more complicated - you can do DHCPv6, or your can do stateless auto-config. Which should you choose and when? Many other aspects of the stack require more knowledge.

And THEN you ALSO need to understand how v4 and v6 interacts so you can provide suitable compatibility - the various different methods of tunnelling and negotiation.